AT&T has just launched their new Option GT Max 3.6 Express mobile broadband HSDPAExpressCard. We have been waiting for something like this to come down the Cingular/AT&T pike for quite a while now, especially since Verizon has been rocking a 3G card in the V640 ExpressCard since late last year. Still, better late than never, right? The Option GT MAx 3.6 Express is being touted by AT&T as a Windows-only device, despite the fact that Option has released Mac drivers for the card. Details about the Sierra Wireless 875U USB HSDPA modem were also released, and that too is showing as being Windows only, despite Mac drivers being available. Our guess? AT&T just won’t help you troubleshoot issues in OS X, but we think it will work just fine.

You can pick up the GT Max 3.6 Express now for $49.99 with two-year contract after $100 rebate, while the Sierra Wireless 875U price is being left in the dark for now. At least we know what will be available in May.